| Mariehamn to Dendermonde | 876.09 mi (1,409.93 km) |
| Mariehamn to Dessel | 838.14 mi (1,348.86 km) |
| Mariehamn to Destelbergen | 883.31 mi (1,421.54 km) |
| Mariehamn to Deurne | 855.97 mi (1,377.55 km) |
| Mariehamn to Diepenbeek | 848.42 mi (1,365.40 km) |
| Mariehamn to Diest | 853.56 mi (1,373.67 km) |
| Mariehamn to Diksmuide | 909.91 mi (1,464.36 km) |
| Mariehamn to Dilbeek | 882.98 mi (1,421.02 km) |
| Mariehamn to Dinant | 897.20 mi (1,443.91 km) |
| Mariehamn to Dison | 853.90 mi (1,374.22 km) |
| Mariehamn to Dour | 919.38 mi (1,479.60 km) |
| Mariehamn to Drongen | 886.94 mi (1,427.39 km) |
| Mariehamn to Duffel | 861.30 mi (1,386.14 km) |
| Mariehamn to Durbuy | 878.77 mi (1,414.24 km) |
| Mariehamn to Ecaussinnes-Lalaing | 899.41 mi (1,447.47 km) |
